Arrhythmias

Question 1

What is the treatment for 3rd-degree AV block?

Answer 1

Artificial cardiac pacemaker

Question 2

What type of AV block involves completely regular RR intervals with dissociated P and QRS complexes?

Answer 2

3rd degree AV block

Question 3

What is the diagnosis for an ECG with a Q wave in lead III, a constant PR interval of 150 ms, and every third P wave that is nonconducted?

Answer 3

2nd degree Mobitz type II AV block

Question 4

What is the management for an unstable patient with bradycardia refractory to atropine?

Answer 4

IV epinephrine or dopamine or transcutaneous pacing

Question 5

Management of ventricular tachycardia:
- Stable:
- Unstable:
-Pulseless:

Answer 5

• Amiodarone or lidocaine
• Electrical cardioversion
• Defibrillation

Question 6

Amiodarone is indicated after the __ cycle of unsuccessful defibrillation.

Answer 6

third

Question 7

What is the recommended treatment for patients with a CHA2DS2-VASc score ≥ 2 in males or ≥ 3 in females?

Answer 7

Oral anticoagulants

Question 8

Stable supraventricular tachycardia (e.g. AVNRT) is managed with_____

Unstable supraventricular tachycardia (e.g. AVNRT) is managed with _____

Answer 8

vagal maneuvers or adenosine
cardioversion

Question 9

What is the recommended management for a hemodynamically stable Wolff-Parkinson-White syndrome patient with atrial fibrillation?

What is the recommended management for a hemodynamically unstable Wolff-Parkinson-White syndrome patient with atrial fibrillation?

Answer 9

Procainamide
Electrical cardioversion

Question 10

What is the most common arrhythmia seen in hyperthyroidism?

Answer 10

Atrial fibrillation

Question 11

What is the initial management for an elderly patient with heat intolerance, sweating, and palpitations and a low TSH and high free T3/T4 on laboratory exam?

Answer 11

β-blocker and anti-thyroid drugs

Question 12

What is the best first step in treating acute atrial fibrillation in a hemodynamically unstable patient?

Answer 12

Synchronized cardioversion (shock)

Question 13

Stable atrial fibrillation is managed with what strategy:

Answer 13

rate > rhythm control

Question 14

Cardioversion in newly-diagnosed atrial fibrillation lasting ≥ 48 hours requires either ____ or ____prior to rhythm control

Answer 14

echo

anticoagulation (warfarin or DOAC)

Question 15

What is the initial treatment for a hemodynamically stable patient with atrial fibrillation with rapid ventricular response?

Answer 15

Rate control (e.g. β-blockers or CCBs)

Question 16

Nonselective beta antagonists, like propranolol, are contraindicated in patients with:

Answer 16

COPD

Question 17

What is the most common location of ectopic foci that cause atrial fibrillation?

Answer 17

Pulmonary veins

Question 18

Atrial fibrillation should be treated with ____ before cardioversion

Answer 18

anticoagulation

Question 19

What is the treatment of a patient after resolution of atrial fibrillation, CHA2DS2-VASc score of 0, and occasional palpitations?

Answer 19

Observation